2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

S5 fuel injectors? Colour and part number?

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Old 12-11-09 | 07:41 AM
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S5 fuel injectors? Colour and part number?

I just bought another FC and will be updating the ecu with the Rtek computer.
question is what colour are the injectors or part numbers that will fit in a 1989 turbo rx7?


19500-2020 are the ones that I have which are 550cc.

Where can I get 720cc?
Old 12-11-09 | 04:14 PM
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Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.
Old 12-11-09 | 04:35 PM
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Originally Posted by RotaryRocket88
Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.
I would rather not wire anything into the harness. Don't they sell normal 720cc that would drop into a 1989 turbo II?

Thanks for the info.
Old 12-11-09 | 05:08 PM
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If by "normal" you mean high impedance, good luck finding some. Almost all aftermarket injectors are low impedance. The wiring is simple and can be done at the ECU side of the harness.
Old 12-11-09 | 05:32 PM
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Originally Posted by RotaryRocket88
Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.

I bought those same greddy injectors....


Hey IAN, heres the link were I wired mine. Its actually simple...

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/lo-imp-injectors-hi-imp-wiring-766262/
Old 12-11-09 | 06:13 PM
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Here's a pic of my resistors. I have a high impedance harness w/ all low impedance injectors, so I used four 6 ohm resistors.

Attached Thumbnails S5 fuel injectors?  Colour and part number?-resistors.jpg  
Old 12-11-09 | 11:52 PM
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Originally Posted by IAN
I just bought another FC and will be updating the ecu with the Rtek computer.
question is what colour are the injectors or part numbers that will fit in a 1989 turbo rx7?


19500-2020 are the ones that I have which are 550cc.

Where can I get 720cc?
shoot bro i got 880 injectors i am selling. along with the wiring harness. if your interested let me know
Old 12-12-09 | 09:28 AM
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Originally Posted by nd_track_driver94
shoot bro i got 880 injectors i am selling. along with the wiring harness. if your interested let me know
Thanks for the offer but the Rtek mod needs 720cc injectors.
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